Ports All Flashcards
FTP Data (active mode)
TCP 20
Used for data in active mode
In passive mode a random TCP port is used for data.
FTP Control Port
TCP 21
Control port stays the same in both active and passive mode.
SSH
SCP
SFTP
TCP 22
<b>S</b>ecure <b>SH</b>ell
<b>S</b>ecure <b>C</b>o<b>P</b>y
<b>S</b>ecure <b>F</b>ile <b>T</b>ransfer <b>P</b>rotocol
Encrypts communications
Telnet
TCP 23
Remote access
Sends data in cleartext and is therefore vulnerable to sniffing attacks
SMTP
TCP 25
Simple Mail Transfer Protocol
TACACS+
TCP 49
Terminal Access Controller Access Control System
TACACS+ developed by Cisco.
Based on TACACS but is a separate protocol
DNS
Name queries UDP 53
Zone transfers TCP 53
TFTP
UDP 69
Used to transfer small amounts of data
Vulnerable in nature, normally disabled
HTTP
TCP 80
Kerberos
UDP 88
An authentication protocol
POP3
TCP 110
Post Office Protocol version 3
SNMP
UDP 161
Simple network management protocol
SNMP trap
UDP 162
<b>SNMP</b> trap is used to send error messages and notifications
NetBIOS Name service
TCP/UDP 137
TCP is rarely used for this
Remember NetBIOS 137-139. Normally they aren’t asked for separately
NetBIOS Datagrams
UDP 138
Remember NetBIOS 137-139. Normally they aren’t asked for separately
